| A | B |
|---|
| enzyme | proteins that act as biological catalysts |
| catalyst | a substance that speeds up the rate of chemical reactions |
| activiation energy | the energy required to start a chemical reaction |
| product | the elements or compounds produced by a chemical reaction |
| reactant | the elements or compound that enter into a chemical reaction |
| chemical reaction | a process that changes or transforms one set of chemicals into another |
| substrate | reactant of an enzyme-catalyzed reaction |
